Chemistry of inorganic compounds – Sulfur or compound thereof – Elemental sulfur
Patent
1987-06-12
1991-08-13
McFarlane, Anthony
Chemistry of inorganic compounds
Sulfur or compound thereof
Elemental sulfur
423242, 423567R, C01B 1704
Patent
active
050395076
ABSTRACT:
A method for the continuous reduction of sulphur dioxide-containing gases essentially free of molecular oxygen, using coal or carbon, which comprises introducing the sulphur dioxide-containing gases into a coal-filled or carbon-filled reactor divided into at least three temperature zones, the temperature of which continuously increases in the direction of flow, including an inlet zone at a temperature of 150.degree. to 200.degree. C., a middle zone having a temperature of 300.degree. to 700.degree. C. and an outlet zone having a temperature of 900.degree. to 1100.degree. C. and passing the sulphur dioxide-containing gases through the zones so that the gases are heated to a final temperature of about 900.degree. to 1100.degree. C. in the outlet zone of the reactor and the sulphur dioxide is reduced to sulfur in the individual temperature zones. In a preferred embodiment, the sulphur dioxide-containing gases are introduced into a reactor having four temperature zones.
REFERENCES:
patent: 2102081 (1937-12-01), Lepsoe
patent: 4341753 (1982-07-01), Mori et al.
McFarlane Anthony
Steuler-Industriewerke GmbH
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